What caused all this?
Thread Starter
TECH Enthusiast
Joined: Nov 2002
Posts: 590
Likes: 0
From: San Diego, CA
What caused all this? My car isn't really that fast. Minor bolt ons..
Runs 13.1 @ 107..
My brother just took my transmission apart and the shop said they'd never seen anything like it.
The sprag was busted.. sprag housing.. clutch drum
He named off all KINDS of ****.
What the hell caused this? I have stock converter... no slicks..
Anybody had the same amount of damage?
Runs 13.1 @ 107..
My brother just took my transmission apart and the shop said they'd never seen anything like it.
The sprag was busted.. sprag housing.. clutch drum
He named off all KINDS of ****.
What the hell caused this? I have stock converter... no slicks..
Anybody had the same amount of damage?
TECH Enthusiast
Joined: Nov 2001
Posts: 521
Likes: 0
From: Farmingdale NJ
If they've never seen a busted sprag in a 700R4/4L60-E, they aren't much of a transmission shop! They break all the time in these cars. Usually straight HP won't do it though. Wheelhop/dry burnouts can do it. So can hard hooks, especially if there was a little spin then dead hook. Borg Warner makes a 29 element sprag that's supposed to be stronger and they're pretty cheap. And yeah, when they go they usually take a bunch of crap with them. I'm guessing your forward sprag went since it broke the drum on the input shaft. The sprag goes around the aluminum center "core" I guess you could say and when they blow up they will usually cause a diagonal crack down the length of it.
Edit: in the future, use "D" when racing not OD. That will engage the overrun clutches and lock up the sprag, taking most of the force off of it.
Edit: in the future, use "D" when racing not OD. That will engage the overrun clutches and lock up the sprag, taking most of the force off of it.
